Drywall Ceilings Or Walls First
Are of no concern but seriously warped framing will.
Drywall ceilings or walls first. Install the top row of panels first pushing each panel up as tight as it will go against the ceiling. Replace your ceiling drywall sheets first. Hang drywall on the ceiling first then the walls.
Using your t brace or a friend to assist you raise the first sheet of drywall to the ceiling and slide it snugly into the corner. Make sure that the tapered edges of the sheet are facing the floor. The drywall on the walls can support the ceiling pieces.
Check the ceiling for bowed joists using a 4 ft. A standard 8 foot high wall accommodates two sheets of drywall installed horizontally. Irregularities less than 1 8 in.
That way the wall pieces support the ceiling pieces. This will help hold your ceiling edges up and give you a nice tight corner. Raise the first piece of drywall to the ceiling.
Professionals always do the lids ceilings first. Then your upper wall sheets go in. Hanging the drywall on the ceiling first is not only simpler but will lead to longer lasting results that require fewer future repairs.
You can create tight and fitted corners more easily. Hanging drywall over your head is no fun. Always do the ceilings first no matter what.